A Voltage Balancing Method for Series-Connected IGBTs Operating as A Fault Current Limiter in High Voltage DC Power Supplies

2020 ◽  
pp. 1-1
Author(s):  
S. Mohsenzade ◽  
M. Zarghani ◽  
S. Kaboli
Keyword(s):  
High Voltage ◽  
Power Supplies ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Voltage Balancing ◽  
Dc Power ◽  
Current Limiter

A novel saturated open-core fault current limiter and its nonlinear magnetic circuit model

2017 ◽  
Vol 36 (6) ◽  
pp. 1739-1749 ◽  
Author(s):  
Lei Li ◽  
Lin Li
Keyword(s):  
Nonlinear Equations ◽  
Magnetic Circuit ◽  
Physical Experiment ◽  
Circuit Model ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Content Type ◽  
Dc Power ◽  
Current Limiter ◽  
Open Core

Purpose This paper aims to present a novel energy-efficient saturated open-core fault current limiter (FCL) with special permanent magnet (PM) modules. Design/methodology/approach The special PM modules are used to drive the cores of FCL into a saturated state from different directions in the normal operation condition, reducing the DC current of the saturated open-core FCL. An equivalent magnetic circuit model of the saturated open-core FCL with PM modules is built to calculate the magnetic flux density in the cores of FCL. By applying the modified nodal approach on the circuit, the nonlinear equations of the magnetic circuit can be achieved. The Newton – Raphson method is used to solve the nonlinear equations. The model shows good accuracy verified by finite element simulation and a physical experiment. Findings Compared with the original saturated open-core FCL structure with PMs, the novel saturated open-core FCL structure can save 84% DC power. The physical experiment results show that the saturated open-core FCL has a good performance on limiting the fault current. Originality/value A novel saturated open-core FCL structure with PM modules is proposed in this paper. A physical model of the saturated open-core FCL structure with PM modules is manufactured and tested. About 84% DC power can be reduced by using the PM modules in this saturated open-core FCL, and it can save most of the cost of the saturated open-core FCL.

Modeling Analysis of Impedance Characteristics of Saturated Core Superconducting Fault Current Limiter

2013 ◽  
Vol 389 ◽  
pp. 1089-1095
Author(s):  
Jun Zhen Peng ◽  
Kun Nan Cao ◽  
Da Da Wang ◽  
Meng Song ◽  
Nan Nan Hu ◽  
...  
Keyword(s):  
High Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Element Analysis ◽  
Superconducting Fault Current Limiter ◽  
Saturation Properties ◽  
Modeling Analysis ◽  
Current Limiter

As one of the most applicable to high-voltage network superconducting fault current limiterSCFCL(saturated core superconducting fault current limiter) ,which use of core saturation properties can be achieved the current-limiting function without delay ,will be the most widely applied in the future,By analyzing the working principle of SCFCL,this paper use of PSCAD and finite element analysis software Ansoft to build the 500kV\/3150A grade SCFCL model and accurate calculation coil self-inductance and mutual inductance, the harmonic of each size and analyzed its Impedance characteristic on the different external parameters,The results show that SCFCL has a excellent performance for high voltage power network short-circuit current limitation, and provides important reference for design.

First Superconducting Fault Current Limiter in Russian Power Grid

2021 ◽  
Vol 4 (4) ◽  
pp. 4-16
Author(s):  
Michael E. MOZAH ◽  
◽  
Sergey V. SAMOYLENKOV ◽  
Andrey P. VAVILOV ◽  
Evgeny P. PROKHOROV ◽  
...  
Keyword(s):  
Power System ◽  
High Voltage ◽  
Short Circuit ◽  
Relay Protection ◽  
Short Circuit Current ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Superconducting Fault Current Limiter ◽  
Current Limiter ◽  
Technical Solutions

Superconducting fault current limiter (SFCL) is an innovative method for reducing the level of short-circuit currents in high-voltage electrical networks. This reduces the number of points of separation of the electrical network in conditions of short-circuit current limitation and thereby increases the network capacity and reliability of power supply to consumers. At the same time, the development of such devices poses new challenges for power engineers related to the integration of this equipment into the existing power system. The article discusses the process of implementation and pilot operation of the SFCT 220 kV pilot project (produced by CJSC “SuperOx”) at the 220/20 kV “Mnevniki” high-voltage substation in Moscow. The project required an extensive set of scientific studies and tests to confirm the characteristics of new devices and the possibility of their use in Russian power systems, the use of digital modeling technologies to test the operability of relay protection devices, as well as the development of new methodological documents for calculating the short-circuit current and relay protection parameters. As a result of the work, SFCT was switched on at the 220/20 kV “Mnevniki” substation at the end of 2019. The subsequent operation of the SFCT in 2019-2020 fully confirmed the declared characteristics of the device and the correctness of the selected technical solutions. The article is devoted to the features of the process of integrating a new device into the existing power system, the main technical solutions, the results of testing and operation of the device, as well as possible prospects for the development of SFCT technology.

scholarly journals A novel concept of fault current limiter based on saturable core in high voltage DC transmission system

AIP Advances ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 056636 ◽  
Author(s):  
Jiaxin Yuan ◽  
Hang Zhou ◽  
Pengcheng Gan ◽  
Yongheng Zhong ◽  
Yanhui Gao ◽  
...  
Keyword(s):  
High Voltage ◽  
Transmission System ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Current Limiter ◽  
Novel Concept
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